The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2020
Filed:
Dec. 22, 2016
Applicant:
Rengo Co., Ltd., Osaka, JP;
Inventors:
Junichi Kubo, Fukui, JP;
Tomoyuki Nakatsubo, Fukui, JP;
Kenichi Ito, Osaka, JP;
Hirokuni Tajima, Osaka, JP;
Assignee:
RENGO CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08B 9/00 (2006.01); C08L 1/22 (2006.01); D01F 2/10 (2006.01); D01F 2/06 (2006.01); D01D 5/40 (2006.01); C08B 9/02 (2006.01); C08B 16/00 (2006.01);
U.S. Cl.
CPC ...
C08B 9/00 (2013.01); C08B 9/02 (2013.01); C08B 16/00 (2013.01); C08L 1/22 (2013.01); D01D 5/40 (2013.01); D01F 2/06 (2013.01); D01F 2/10 (2013.01); C08L 2205/16 (2013.01);
Abstract
Nanofiber that keep crystallinity are obtained from a cellulose material under light load. The nanofiber are obtained by treating a material containing cellulose with 4% by mass or more and 9% by mass or less of an aqueous alkali metal hydroxide solution to produce alkali cellulose, reacting the alkali cellulose with carbon disulfide to give cellulose xanthate, and defibrating the cellulose xanthate. Then, the xanthate is treated with acid or heat to be regenerated into cellulose nanofiber.